Kit from store does not contain correct bolt sizes for threading into the 3 holes... I bought new balancer and they dont fit into there either. Going to hardware store with new balancer to figure out bolt size... does anyone know? Also, on the old unit, is it posible the holes are not aligned anymore? It'* pretty worn.

Thanks in advance for a quick reply.

Should be 1/4"-28 pitch.

Yes, went back to parts store, there is a separate bolt kit for GM'*... used those. Thanks!

Cool, glad it worked. FYI you can also pick up 1/4"-28 bolts of different lengths at hardware stores. They often have more variety than the auto parts stores do. I've found this useful when clearances aren't what the puller manufacturer expects.